Near‐Infrared Light Catalysis of Carbon Dioxide Reduction by Conjugated Porous Aromatic Frameworks
Abstract
Abstract Current CO 2 photocatalytic systems mainly work in ultraviolet (UV) and visible (Vis) light regions, and the inability to utilize the abundant near‐infrared (NIR) radiation or the low utilization rate is still a bottleneck for practical applications. We address this challenge through the strategic synthesis of metal‐free conjugated porous aromatic frameworks (PAFs), PAF‐332‐DCM, to enhance the NIR absorption capabilities, achieving a CO production rate of ~74.7 µmol g −1 h −1 in gas‐solid phase CO 2 reduction, surpassing typical NIR‐responsive catalysts. Meanwhile, PAF‐332‐DCM can obtain a CO production rate of 344.1 µmol g −1 h −1 in full‐spectrum irradiated CO 2 reduction. Infrared thermography reveals that the non‐radiative attenuation of PAF‐332‐DCM leads to high photothermal temperature under NIR irradiation, which accounts for its reduction performance. Mechanistic studies combining fs‐TA spectroscopy and in situ infrared characterization elucidate the photocatalytic pathway and intermediate formation. This result indicates that PAF‐332‐DCM can be a promising metal‐free catalyst for practical solar‐driven CO 2 conversion.
Article Details
Authors (6)
Zihao Wang
Chi Cao
National Synchrotron Radiation Laboratory (NSRL)
Li Jiang
Department of Radiation Oncology The First Affiliated Hospital of Guangxi Medical University Nanning China
Zihao Xing
Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry
Jiangtao Jia
Key Laboratory of Polyoxometalate and Reticular Material Chemistry of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
Guangshan Zhu
College of Chemistry